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Convergence articles

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Given a semicircle, Prove that if O is the circle's center, DO=OE.
Page 8, Images from the Paul Halmos Photograph Collection: Armand Borel, Karol Borsuk, Raoul Bott, William Browder, H. Arlen Brown, and R. Creighton Buck
The radius of a circle is 3.20 meters. Compute to within .001m the areas of the inscribed and circumscribed equilateral triangles.
Four episodes in the history of geometry are discussed, where dynamic geometry helps in understanding the ideas.
Page from the table of contents of Robert Recorde's The Grounde of Artes (1543) in which is outlined the first dialogue. This dialogue deals with some of the elements of arithmetic, including the basic operations and the use of the rule of three (or the Golden rule).
In a right triangle, the hypotenuse is 9.434 and the sum of the sides around the right angle is 13. Find the lengths of the sides around the right angle.
A horse halving its speed every day runs 700 miles in 7 days.
The paperback reprint of this large collection of articles by experts on all aspects of the history and philosophy of mathematics.
A translation from the original Greek of a manuscript on magic squares by the Byzantine scholar Manuel Moschopoulos, written about 1315
Images from a 16th century text about the astrolabe and its uses